We all enjoy the beautiful show of colours as leaves change each autumn. But did you ever wonder how and why this happens?
Leaves are nature’s food factories. Plants take water from the ground through their roots and take carbon dioxide (二氧化碳) from the air. Plants use sunlight to turn water and carbon dioxide into glucose (葡萄糖). Glucose is a kind of sugar, which plants use as food for energy and growing.
The way plants turn water and carbon dioxide into sugar is called photosynthesis that means “ putting together with light”. A chemical called chlorophyll helps photosynthesis. It gives plants their green colour. As summer ends and autumn comes, the days get shorter and shorter, and trees “know” to begin getting ready for winter.
During winter, there is not enough light or water for photosynthesis. Trees rest during this time and live on the food they store during the summer. They begin to shut down their food-making factories.
As the green chlorophyll disappears from the leaves, we begin to see yellow and orange leaves. Small amounts of these colours have been in the leaves all along. We just can’t see them in the summer, because they are covered up by the green chlorophyll.
The bright reds and purples we see in leaves are made mostly in autumn. In some trees, like maples (枫树), glucose is caught in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn turn this glucose into a red colour. The brown colour of trees like oaks (橡树) is made from waste left in the leaves.
It is the mixture of all these things that makes the beautiful colours we enjoy during autumn.
【小题1】The word “chlorophyll” in the third paragraph means _______ in Chinese.

根据句意，用所给单词的适当形式填空。

1.Does he have any criminal records for __________ (thief)?

2.They live on the _________ (twelve) floor in the building.

3.The problem of ___________ (blind) is very serous. We will solve it soon.

4.They can make modern machines with the __________(develop) of science.

5.Do you think Gong Li is a great ____________ (beautiful)?

Did you watch the magic shows played by Liu Qian from Taiwan in the 2009 CCTV Spring Festival Gala(春晚)? They attracted great attention and wide interests of the audience. During the gala, Liu managed to drop a coin into a glass which was placed upside down and transferred a finger ring into an egg. The two magic shows were so successful that everyone is now mad about him and all want to know how to play magic tricks. “I saw the surprise on everyone’s face. It was

cool,” Liu said.

However, you may not believe that Liu didn’t go to any magic school. He just learned by himself. When Liu was seven, he saw a coin trick in a big store. At that moment Liu decided to learn magic. He worked hard at it. He practiced hard to improve his skills. Then one day he was able to put on a show for his class.

After years of hard work, now Liu is a great magician. But he isn’t satisfied with what he has got and keep on trying every day. He may spend three years

working out a new show.

1.Liu Qian becomes famous ______________.

A. because he is from Taiwan B. for his magic shows

C. only in Taiwan D. when he was seven

2.According to the passage, we can use the following words to describe Liu Qian EXCEPT ___.

A. creative B. hardworking C. satisfied D. wise

3.What does the underlined word “transferred” mean?

A. 制作 B. 进入 C. 输入 D.转移